Loading...
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * pgtable.h: SpitFire page table operations.
4 *
5 * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
9#ifndef _SPARC64_PGTABLE_H
10#define _SPARC64_PGTABLE_H
11
12/* This file contains the functions and defines necessary to modify and use
13 * the SpitFire page tables.
14 */
15
16#include <asm-generic/5level-fixup.h>
17#include <linux/compiler.h>
18#include <linux/const.h>
19#include <asm/types.h>
20#include <asm/spitfire.h>
21#include <asm/asi.h>
22#include <asm/adi.h>
23#include <asm/page.h>
24#include <asm/processor.h>
25
26/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
27 * The page copy blockops can use 0x6000000 to 0x8000000.
28 * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
29 * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
30 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
31 * The vmalloc area spans 0x100000000 to 0x200000000.
32 * Since modules need to be in the lowest 32-bits of the address space,
33 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
34 * There is a single static kernel PMD which maps from 0x0 to address
35 * 0x400000000.
36 */
37#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
38#define TSBMAP_8K_BASE _AC(0x0000000008000000,UL)
39#define TSBMAP_4M_BASE _AC(0x0000000008400000,UL)
40#define MODULES_VADDR _AC(0x0000000010000000,UL)
41#define MODULES_LEN _AC(0x00000000e0000000,UL)
42#define MODULES_END _AC(0x00000000f0000000,UL)
43#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
44#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
45#define VMALLOC_START _AC(0x0000000100000000,UL)
46#define VMEMMAP_BASE VMALLOC_END
47
48/* PMD_SHIFT determines the size of the area a second-level page
49 * table can map
50 */
51#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
52#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
53#define PMD_MASK (~(PMD_SIZE-1))
54#define PMD_BITS (PAGE_SHIFT - 3)
55
56/* PUD_SHIFT determines the size of the area a third-level page
57 * table can map
58 */
59#define PUD_SHIFT (PMD_SHIFT + PMD_BITS)
60#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
61#define PUD_MASK (~(PUD_SIZE-1))
62#define PUD_BITS (PAGE_SHIFT - 3)
63
64/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
65#define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS)
66#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
67#define PGDIR_MASK (~(PGDIR_SIZE-1))
68#define PGDIR_BITS (PAGE_SHIFT - 3)
69
70#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
71#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
72#endif
73
74#if (PGDIR_SHIFT + PGDIR_BITS) != 53
75#error Page table parameters do not cover virtual address space properly.
76#endif
77
78#if (PMD_SHIFT != HPAGE_SHIFT)
79#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
80#endif
81
82#ifndef __ASSEMBLY__
83
84extern unsigned long VMALLOC_END;
85
86#define vmemmap ((struct page *)VMEMMAP_BASE)
87
88#include <linux/sched.h>
89
90bool kern_addr_valid(unsigned long addr);
91
92/* Entries per page directory level. */
93#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
94#define PTRS_PER_PMD (1UL << PMD_BITS)
95#define PTRS_PER_PUD (1UL << PUD_BITS)
96#define PTRS_PER_PGD (1UL << PGDIR_BITS)
97
98/* Kernel has a separate 44bit address space. */
99#define FIRST_USER_ADDRESS 0UL
100
101#define pmd_ERROR(e) \
102 pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \
103 __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0))
104#define pud_ERROR(e) \
105 pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \
106 __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0))
107#define pgd_ERROR(e) \
108 pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \
109 __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0))
110
111#endif /* !(__ASSEMBLY__) */
112
113/* PTE bits which are the same in SUN4U and SUN4V format. */
114#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
115#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
116#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
117#define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */
118#define _PAGE_PUD_HUGE _PAGE_PMD_HUGE
119
120/* SUN4U pte bits... */
121#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
122#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
123#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
124#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
125#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
126#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
127#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
128#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
129#define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */
130#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
131#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
132#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
133#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
134#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
135#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
136#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
137#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
138#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
139#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
140#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
141#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
142#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
143#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
144#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
145#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
146#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
147#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
148#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
149#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
150
151/* SUN4V pte bits... */
152#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
153#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
154#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
155#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
156#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
157#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
158#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
159#define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */
160#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
161#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
162#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
163#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
164#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
165/* Bit 9 is used to enable MCD corruption detection instead on M7 */
166#define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */
167#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
168#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
169#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
170#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
171#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
172#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
173#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
174#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
175#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
176#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
177#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
178#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
179#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
180#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
181#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
182
183#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
184#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
185
186#if REAL_HPAGE_SHIFT != 22
187#error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
188#endif
189
190#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
191#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
192
193/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
194#define __P000 __pgprot(0)
195#define __P001 __pgprot(0)
196#define __P010 __pgprot(0)
197#define __P011 __pgprot(0)
198#define __P100 __pgprot(0)
199#define __P101 __pgprot(0)
200#define __P110 __pgprot(0)
201#define __P111 __pgprot(0)
202
203#define __S000 __pgprot(0)
204#define __S001 __pgprot(0)
205#define __S010 __pgprot(0)
206#define __S011 __pgprot(0)
207#define __S100 __pgprot(0)
208#define __S101 __pgprot(0)
209#define __S110 __pgprot(0)
210#define __S111 __pgprot(0)
211
212#ifndef __ASSEMBLY__
213
214pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
215
216unsigned long pte_sz_bits(unsigned long size);
217
218extern pgprot_t PAGE_KERNEL;
219extern pgprot_t PAGE_KERNEL_LOCKED;
220extern pgprot_t PAGE_COPY;
221extern pgprot_t PAGE_SHARED;
222
223/* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
224extern unsigned long _PAGE_IE;
225extern unsigned long _PAGE_E;
226extern unsigned long _PAGE_CACHE;
227
228extern unsigned long pg_iobits;
229extern unsigned long _PAGE_ALL_SZ_BITS;
230
231extern struct page *mem_map_zero;
232#define ZERO_PAGE(vaddr) (mem_map_zero)
233
234/* PFNs are real physical page numbers. However, mem_map only begins to record
235 * per-page information starting at pfn_base. This is to handle systems where
236 * the first physical page in the machine is at some huge physical address,
237 * such as 4GB. This is common on a partitioned E10000, for example.
238 */
239static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
240{
241 unsigned long paddr = pfn << PAGE_SHIFT;
242
243 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
244 return __pte(paddr | pgprot_val(prot));
245}
246#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
247
248#ifdef CONFIG_TRANSPARENT_HUGEPAGE
249static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
250{
251 pte_t pte = pfn_pte(page_nr, pgprot);
252
253 return __pmd(pte_val(pte));
254}
255#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
256#endif
257
258/* This one can be done with two shifts. */
259static inline unsigned long pte_pfn(pte_t pte)
260{
261 unsigned long ret;
262
263 __asm__ __volatile__(
264 "\n661: sllx %1, %2, %0\n"
265 " srlx %0, %3, %0\n"
266 " .section .sun4v_2insn_patch, \"ax\"\n"
267 " .word 661b\n"
268 " sllx %1, %4, %0\n"
269 " srlx %0, %5, %0\n"
270 " .previous\n"
271 : "=r" (ret)
272 : "r" (pte_val(pte)),
273 "i" (21), "i" (21 + PAGE_SHIFT),
274 "i" (8), "i" (8 + PAGE_SHIFT));
275
276 return ret;
277}
278#define pte_page(x) pfn_to_page(pte_pfn(x))
279
280static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
281{
282 unsigned long mask, tmp;
283
284 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
285 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
286 *
287 * Even if we use negation tricks the result is still a 6
288 * instruction sequence, so don't try to play fancy and just
289 * do the most straightforward implementation.
290 *
291 * Note: We encode this into 3 sun4v 2-insn patch sequences.
292 */
293
294 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
295 __asm__ __volatile__(
296 "\n661: sethi %%uhi(%2), %1\n"
297 " sethi %%hi(%2), %0\n"
298 "\n662: or %1, %%ulo(%2), %1\n"
299 " or %0, %%lo(%2), %0\n"
300 "\n663: sllx %1, 32, %1\n"
301 " or %0, %1, %0\n"
302 " .section .sun4v_2insn_patch, \"ax\"\n"
303 " .word 661b\n"
304 " sethi %%uhi(%3), %1\n"
305 " sethi %%hi(%3), %0\n"
306 " .word 662b\n"
307 " or %1, %%ulo(%3), %1\n"
308 " or %0, %%lo(%3), %0\n"
309 " .word 663b\n"
310 " sllx %1, 32, %1\n"
311 " or %0, %1, %0\n"
312 " .previous\n"
313 " .section .sun_m7_2insn_patch, \"ax\"\n"
314 " .word 661b\n"
315 " sethi %%uhi(%4), %1\n"
316 " sethi %%hi(%4), %0\n"
317 " .word 662b\n"
318 " or %1, %%ulo(%4), %1\n"
319 " or %0, %%lo(%4), %0\n"
320 " .word 663b\n"
321 " sllx %1, 32, %1\n"
322 " or %0, %1, %0\n"
323 " .previous\n"
324 : "=r" (mask), "=r" (tmp)
325 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
326 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
327 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
328 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
329 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
330 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
331 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
332 _PAGE_CP_4V | _PAGE_E_4V |
333 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
334
335 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
336}
337
338#ifdef CONFIG_TRANSPARENT_HUGEPAGE
339static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
340{
341 pte_t pte = __pte(pmd_val(pmd));
342
343 pte = pte_modify(pte, newprot);
344
345 return __pmd(pte_val(pte));
346}
347#endif
348
349static inline pgprot_t pgprot_noncached(pgprot_t prot)
350{
351 unsigned long val = pgprot_val(prot);
352
353 __asm__ __volatile__(
354 "\n661: andn %0, %2, %0\n"
355 " or %0, %3, %0\n"
356 " .section .sun4v_2insn_patch, \"ax\"\n"
357 " .word 661b\n"
358 " andn %0, %4, %0\n"
359 " or %0, %5, %0\n"
360 " .previous\n"
361 " .section .sun_m7_2insn_patch, \"ax\"\n"
362 " .word 661b\n"
363 " andn %0, %6, %0\n"
364 " or %0, %5, %0\n"
365 " .previous\n"
366 : "=r" (val)
367 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
368 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
369 "i" (_PAGE_CP_4V));
370
371 return __pgprot(val);
372}
373/* Various pieces of code check for platform support by ifdef testing
374 * on "pgprot_noncached". That's broken and should be fixed, but for
375 * now...
376 */
377#define pgprot_noncached pgprot_noncached
378
379#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
380extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
381 struct page *page, int writable);
382#define arch_make_huge_pte arch_make_huge_pte
383static inline unsigned long __pte_default_huge_mask(void)
384{
385 unsigned long mask;
386
387 __asm__ __volatile__(
388 "\n661: sethi %%uhi(%1), %0\n"
389 " sllx %0, 32, %0\n"
390 " .section .sun4v_2insn_patch, \"ax\"\n"
391 " .word 661b\n"
392 " mov %2, %0\n"
393 " nop\n"
394 " .previous\n"
395 : "=r" (mask)
396 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
397
398 return mask;
399}
400
401static inline pte_t pte_mkhuge(pte_t pte)
402{
403 return __pte(pte_val(pte) | __pte_default_huge_mask());
404}
405
406static inline bool is_default_hugetlb_pte(pte_t pte)
407{
408 unsigned long mask = __pte_default_huge_mask();
409
410 return (pte_val(pte) & mask) == mask;
411}
412
413static inline bool is_hugetlb_pmd(pmd_t pmd)
414{
415 return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
416}
417
418static inline bool is_hugetlb_pud(pud_t pud)
419{
420 return !!(pud_val(pud) & _PAGE_PUD_HUGE);
421}
422
423#ifdef CONFIG_TRANSPARENT_HUGEPAGE
424static inline pmd_t pmd_mkhuge(pmd_t pmd)
425{
426 pte_t pte = __pte(pmd_val(pmd));
427
428 pte = pte_mkhuge(pte);
429 pte_val(pte) |= _PAGE_PMD_HUGE;
430
431 return __pmd(pte_val(pte));
432}
433#endif
434#else
435static inline bool is_hugetlb_pte(pte_t pte)
436{
437 return false;
438}
439#endif
440
441static inline pte_t pte_mkdirty(pte_t pte)
442{
443 unsigned long val = pte_val(pte), tmp;
444
445 __asm__ __volatile__(
446 "\n661: or %0, %3, %0\n"
447 " nop\n"
448 "\n662: nop\n"
449 " nop\n"
450 " .section .sun4v_2insn_patch, \"ax\"\n"
451 " .word 661b\n"
452 " sethi %%uhi(%4), %1\n"
453 " sllx %1, 32, %1\n"
454 " .word 662b\n"
455 " or %1, %%lo(%4), %1\n"
456 " or %0, %1, %0\n"
457 " .previous\n"
458 : "=r" (val), "=r" (tmp)
459 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
460 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
461
462 return __pte(val);
463}
464
465static inline pte_t pte_mkclean(pte_t pte)
466{
467 unsigned long val = pte_val(pte), tmp;
468
469 __asm__ __volatile__(
470 "\n661: andn %0, %3, %0\n"
471 " nop\n"
472 "\n662: nop\n"
473 " nop\n"
474 " .section .sun4v_2insn_patch, \"ax\"\n"
475 " .word 661b\n"
476 " sethi %%uhi(%4), %1\n"
477 " sllx %1, 32, %1\n"
478 " .word 662b\n"
479 " or %1, %%lo(%4), %1\n"
480 " andn %0, %1, %0\n"
481 " .previous\n"
482 : "=r" (val), "=r" (tmp)
483 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
484 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
485
486 return __pte(val);
487}
488
489static inline pte_t pte_mkwrite(pte_t pte)
490{
491 unsigned long val = pte_val(pte), mask;
492
493 __asm__ __volatile__(
494 "\n661: mov %1, %0\n"
495 " nop\n"
496 " .section .sun4v_2insn_patch, \"ax\"\n"
497 " .word 661b\n"
498 " sethi %%uhi(%2), %0\n"
499 " sllx %0, 32, %0\n"
500 " .previous\n"
501 : "=r" (mask)
502 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
503
504 return __pte(val | mask);
505}
506
507static inline pte_t pte_wrprotect(pte_t pte)
508{
509 unsigned long val = pte_val(pte), tmp;
510
511 __asm__ __volatile__(
512 "\n661: andn %0, %3, %0\n"
513 " nop\n"
514 "\n662: nop\n"
515 " nop\n"
516 " .section .sun4v_2insn_patch, \"ax\"\n"
517 " .word 661b\n"
518 " sethi %%uhi(%4), %1\n"
519 " sllx %1, 32, %1\n"
520 " .word 662b\n"
521 " or %1, %%lo(%4), %1\n"
522 " andn %0, %1, %0\n"
523 " .previous\n"
524 : "=r" (val), "=r" (tmp)
525 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
526 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
527
528 return __pte(val);
529}
530
531static inline pte_t pte_mkold(pte_t pte)
532{
533 unsigned long mask;
534
535 __asm__ __volatile__(
536 "\n661: mov %1, %0\n"
537 " nop\n"
538 " .section .sun4v_2insn_patch, \"ax\"\n"
539 " .word 661b\n"
540 " sethi %%uhi(%2), %0\n"
541 " sllx %0, 32, %0\n"
542 " .previous\n"
543 : "=r" (mask)
544 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
545
546 mask |= _PAGE_R;
547
548 return __pte(pte_val(pte) & ~mask);
549}
550
551static inline pte_t pte_mkyoung(pte_t pte)
552{
553 unsigned long mask;
554
555 __asm__ __volatile__(
556 "\n661: mov %1, %0\n"
557 " nop\n"
558 " .section .sun4v_2insn_patch, \"ax\"\n"
559 " .word 661b\n"
560 " sethi %%uhi(%2), %0\n"
561 " sllx %0, 32, %0\n"
562 " .previous\n"
563 : "=r" (mask)
564 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
565
566 mask |= _PAGE_R;
567
568 return __pte(pte_val(pte) | mask);
569}
570
571static inline pte_t pte_mkspecial(pte_t pte)
572{
573 pte_val(pte) |= _PAGE_SPECIAL;
574 return pte;
575}
576
577static inline pte_t pte_mkmcd(pte_t pte)
578{
579 pte_val(pte) |= _PAGE_MCD_4V;
580 return pte;
581}
582
583static inline pte_t pte_mknotmcd(pte_t pte)
584{
585 pte_val(pte) &= ~_PAGE_MCD_4V;
586 return pte;
587}
588
589static inline unsigned long pte_young(pte_t pte)
590{
591 unsigned long mask;
592
593 __asm__ __volatile__(
594 "\n661: mov %1, %0\n"
595 " nop\n"
596 " .section .sun4v_2insn_patch, \"ax\"\n"
597 " .word 661b\n"
598 " sethi %%uhi(%2), %0\n"
599 " sllx %0, 32, %0\n"
600 " .previous\n"
601 : "=r" (mask)
602 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
603
604 return (pte_val(pte) & mask);
605}
606
607static inline unsigned long pte_dirty(pte_t pte)
608{
609 unsigned long mask;
610
611 __asm__ __volatile__(
612 "\n661: mov %1, %0\n"
613 " nop\n"
614 " .section .sun4v_2insn_patch, \"ax\"\n"
615 " .word 661b\n"
616 " sethi %%uhi(%2), %0\n"
617 " sllx %0, 32, %0\n"
618 " .previous\n"
619 : "=r" (mask)
620 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
621
622 return (pte_val(pte) & mask);
623}
624
625static inline unsigned long pte_write(pte_t pte)
626{
627 unsigned long mask;
628
629 __asm__ __volatile__(
630 "\n661: mov %1, %0\n"
631 " nop\n"
632 " .section .sun4v_2insn_patch, \"ax\"\n"
633 " .word 661b\n"
634 " sethi %%uhi(%2), %0\n"
635 " sllx %0, 32, %0\n"
636 " .previous\n"
637 : "=r" (mask)
638 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
639
640 return (pte_val(pte) & mask);
641}
642
643static inline unsigned long pte_exec(pte_t pte)
644{
645 unsigned long mask;
646
647 __asm__ __volatile__(
648 "\n661: sethi %%hi(%1), %0\n"
649 " .section .sun4v_1insn_patch, \"ax\"\n"
650 " .word 661b\n"
651 " mov %2, %0\n"
652 " .previous\n"
653 : "=r" (mask)
654 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
655
656 return (pte_val(pte) & mask);
657}
658
659static inline unsigned long pte_present(pte_t pte)
660{
661 unsigned long val = pte_val(pte);
662
663 __asm__ __volatile__(
664 "\n661: and %0, %2, %0\n"
665 " .section .sun4v_1insn_patch, \"ax\"\n"
666 " .word 661b\n"
667 " and %0, %3, %0\n"
668 " .previous\n"
669 : "=r" (val)
670 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
671
672 return val;
673}
674
675#define pte_accessible pte_accessible
676static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
677{
678 return pte_val(a) & _PAGE_VALID;
679}
680
681static inline unsigned long pte_special(pte_t pte)
682{
683 return pte_val(pte) & _PAGE_SPECIAL;
684}
685
686static inline unsigned long pmd_large(pmd_t pmd)
687{
688 pte_t pte = __pte(pmd_val(pmd));
689
690 return pte_val(pte) & _PAGE_PMD_HUGE;
691}
692
693static inline unsigned long pmd_pfn(pmd_t pmd)
694{
695 pte_t pte = __pte(pmd_val(pmd));
696
697 return pte_pfn(pte);
698}
699
700#define pmd_write pmd_write
701static inline unsigned long pmd_write(pmd_t pmd)
702{
703 pte_t pte = __pte(pmd_val(pmd));
704
705 return pte_write(pte);
706}
707
708#define pud_write(pud) pte_write(__pte(pud_val(pud)))
709
710#ifdef CONFIG_TRANSPARENT_HUGEPAGE
711static inline unsigned long pmd_dirty(pmd_t pmd)
712{
713 pte_t pte = __pte(pmd_val(pmd));
714
715 return pte_dirty(pte);
716}
717
718static inline unsigned long pmd_young(pmd_t pmd)
719{
720 pte_t pte = __pte(pmd_val(pmd));
721
722 return pte_young(pte);
723}
724
725static inline unsigned long pmd_trans_huge(pmd_t pmd)
726{
727 pte_t pte = __pte(pmd_val(pmd));
728
729 return pte_val(pte) & _PAGE_PMD_HUGE;
730}
731
732static inline pmd_t pmd_mkold(pmd_t pmd)
733{
734 pte_t pte = __pte(pmd_val(pmd));
735
736 pte = pte_mkold(pte);
737
738 return __pmd(pte_val(pte));
739}
740
741static inline pmd_t pmd_wrprotect(pmd_t pmd)
742{
743 pte_t pte = __pte(pmd_val(pmd));
744
745 pte = pte_wrprotect(pte);
746
747 return __pmd(pte_val(pte));
748}
749
750static inline pmd_t pmd_mkdirty(pmd_t pmd)
751{
752 pte_t pte = __pte(pmd_val(pmd));
753
754 pte = pte_mkdirty(pte);
755
756 return __pmd(pte_val(pte));
757}
758
759static inline pmd_t pmd_mkclean(pmd_t pmd)
760{
761 pte_t pte = __pte(pmd_val(pmd));
762
763 pte = pte_mkclean(pte);
764
765 return __pmd(pte_val(pte));
766}
767
768static inline pmd_t pmd_mkyoung(pmd_t pmd)
769{
770 pte_t pte = __pte(pmd_val(pmd));
771
772 pte = pte_mkyoung(pte);
773
774 return __pmd(pte_val(pte));
775}
776
777static inline pmd_t pmd_mkwrite(pmd_t pmd)
778{
779 pte_t pte = __pte(pmd_val(pmd));
780
781 pte = pte_mkwrite(pte);
782
783 return __pmd(pte_val(pte));
784}
785
786static inline pgprot_t pmd_pgprot(pmd_t entry)
787{
788 unsigned long val = pmd_val(entry);
789
790 return __pgprot(val);
791}
792#endif
793
794static inline int pmd_present(pmd_t pmd)
795{
796 return pmd_val(pmd) != 0UL;
797}
798
799#define pmd_none(pmd) (!pmd_val(pmd))
800
801/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
802 * very simple, it's just the physical address. PTE tables are of
803 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
804 * the top bits outside of the range of any physical address size we
805 * support are clear as well. We also validate the physical itself.
806 */
807#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
808
809#define pud_none(pud) (!pud_val(pud))
810
811#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
812
813#define pgd_none(pgd) (!pgd_val(pgd))
814
815#define pgd_bad(pgd) (pgd_val(pgd) & ~PAGE_MASK)
816
817#ifdef CONFIG_TRANSPARENT_HUGEPAGE
818void set_pmd_at(struct mm_struct *mm, unsigned long addr,
819 pmd_t *pmdp, pmd_t pmd);
820#else
821static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
822 pmd_t *pmdp, pmd_t pmd)
823{
824 *pmdp = pmd;
825}
826#endif
827
828static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
829{
830 unsigned long val = __pa((unsigned long) (ptep));
831
832 pmd_val(*pmdp) = val;
833}
834
835#define pud_set(pudp, pmdp) \
836 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
837static inline unsigned long __pmd_page(pmd_t pmd)
838{
839 pte_t pte = __pte(pmd_val(pmd));
840 unsigned long pfn;
841
842 pfn = pte_pfn(pte);
843
844 return ((unsigned long) __va(pfn << PAGE_SHIFT));
845}
846
847static inline unsigned long pud_page_vaddr(pud_t pud)
848{
849 pte_t pte = __pte(pud_val(pud));
850 unsigned long pfn;
851
852 pfn = pte_pfn(pte);
853
854 return ((unsigned long) __va(pfn << PAGE_SHIFT));
855}
856
857#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
858#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
859#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
860#define pud_present(pud) (pud_val(pud) != 0U)
861#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
862#define pgd_page_vaddr(pgd) \
863 ((unsigned long) __va(pgd_val(pgd)))
864#define pgd_present(pgd) (pgd_val(pgd) != 0U)
865#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL)
866
867/* only used by the stubbed out hugetlb gup code, should never be called */
868#define pgd_page(pgd) NULL
869
870static inline unsigned long pud_large(pud_t pud)
871{
872 pte_t pte = __pte(pud_val(pud));
873
874 return pte_val(pte) & _PAGE_PMD_HUGE;
875}
876
877static inline unsigned long pud_pfn(pud_t pud)
878{
879 pte_t pte = __pte(pud_val(pud));
880
881 return pte_pfn(pte);
882}
883
884/* Same in both SUN4V and SUN4U. */
885#define pte_none(pte) (!pte_val(pte))
886
887#define pgd_set(pgdp, pudp) \
888 (pgd_val(*(pgdp)) = (__pa((unsigned long) (pudp))))
889
890/* to find an entry in a page-table-directory. */
891#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
892#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
893
894/* to find an entry in a kernel page-table-directory */
895#define pgd_offset_k(address) pgd_offset(&init_mm, address)
896
897/* Find an entry in the third-level page table.. */
898#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
899#define pud_offset(pgdp, address) \
900 ((pud_t *) pgd_page_vaddr(*(pgdp)) + pud_index(address))
901
902/* Find an entry in the second-level page table.. */
903#define pmd_offset(pudp, address) \
904 ((pmd_t *) pud_page_vaddr(*(pudp)) + \
905 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
906
907/* Find an entry in the third-level page table.. */
908#define pte_index(dir, address) \
909 ((pte_t *) __pmd_page(*(dir)) + \
910 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
911#define pte_offset_kernel pte_index
912#define pte_offset_map pte_index
913#define pte_unmap(pte) do { } while (0)
914
915/* We cannot include <linux/mm_types.h> at this point yet: */
916extern struct mm_struct init_mm;
917
918/* Actual page table PTE updates. */
919void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
920 pte_t *ptep, pte_t orig, int fullmm,
921 unsigned int hugepage_shift);
922
923static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
924 pte_t *ptep, pte_t orig, int fullmm,
925 unsigned int hugepage_shift)
926{
927 /* It is more efficient to let flush_tlb_kernel_range()
928 * handle init_mm tlb flushes.
929 *
930 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
931 * and SUN4V pte layout, so this inline test is fine.
932 */
933 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
934 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
935}
936
937#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
938static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
939 unsigned long addr,
940 pmd_t *pmdp)
941{
942 pmd_t pmd = *pmdp;
943 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
944 return pmd;
945}
946
947static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
948 pte_t *ptep, pte_t pte, int fullmm)
949{
950 pte_t orig = *ptep;
951
952 *ptep = pte;
953 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
954}
955
956#define set_pte_at(mm,addr,ptep,pte) \
957 __set_pte_at((mm), (addr), (ptep), (pte), 0)
958
959#define pte_clear(mm,addr,ptep) \
960 set_pte_at((mm), (addr), (ptep), __pte(0UL))
961
962#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
963#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
964 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
965
966#ifdef DCACHE_ALIASING_POSSIBLE
967#define __HAVE_ARCH_MOVE_PTE
968#define move_pte(pte, prot, old_addr, new_addr) \
969({ \
970 pte_t newpte = (pte); \
971 if (tlb_type != hypervisor && pte_present(pte)) { \
972 unsigned long this_pfn = pte_pfn(pte); \
973 \
974 if (pfn_valid(this_pfn) && \
975 (((old_addr) ^ (new_addr)) & (1 << 13))) \
976 flush_dcache_page_all(current->mm, \
977 pfn_to_page(this_pfn)); \
978 } \
979 newpte; \
980})
981#endif
982
983extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
984
985void paging_init(void);
986unsigned long find_ecache_flush_span(unsigned long size);
987
988struct seq_file;
989void mmu_info(struct seq_file *);
990
991struct vm_area_struct;
992void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
993#ifdef CONFIG_TRANSPARENT_HUGEPAGE
994void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
995 pmd_t *pmd);
996
997#define __HAVE_ARCH_PMDP_INVALIDATE
998extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
999 pmd_t *pmdp);
1000
1001#define __HAVE_ARCH_PGTABLE_DEPOSIT
1002void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
1003 pgtable_t pgtable);
1004
1005#define __HAVE_ARCH_PGTABLE_WITHDRAW
1006pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
1007#endif
1008
1009/* Encode and de-code a swap entry */
1010#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
1011#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
1012#define __swp_entry(type, offset) \
1013 ( (swp_entry_t) \
1014 { \
1015 (((long)(type) << PAGE_SHIFT) | \
1016 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
1017 } )
1018#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
1019#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
1020
1021int page_in_phys_avail(unsigned long paddr);
1022
1023/*
1024 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
1025 * its high 4 bits. These macros/functions put it there or get it from there.
1026 */
1027#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
1028#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
1029#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
1030
1031int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
1032 unsigned long, pgprot_t);
1033
1034void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1035 unsigned long addr, pte_t pte);
1036
1037int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1038 unsigned long addr, pte_t oldpte);
1039
1040#define __HAVE_ARCH_DO_SWAP_PAGE
1041static inline void arch_do_swap_page(struct mm_struct *mm,
1042 struct vm_area_struct *vma,
1043 unsigned long addr,
1044 pte_t pte, pte_t oldpte)
1045{
1046 /* If this is a new page being mapped in, there can be no
1047 * ADI tags stored away for this page. Skip looking for
1048 * stored tags
1049 */
1050 if (pte_none(oldpte))
1051 return;
1052
1053 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
1054 adi_restore_tags(mm, vma, addr, pte);
1055}
1056
1057#define __HAVE_ARCH_UNMAP_ONE
1058static inline int arch_unmap_one(struct mm_struct *mm,
1059 struct vm_area_struct *vma,
1060 unsigned long addr, pte_t oldpte)
1061{
1062 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
1063 return adi_save_tags(mm, vma, addr, oldpte);
1064 return 0;
1065}
1066
1067static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1068 unsigned long from, unsigned long pfn,
1069 unsigned long size, pgprot_t prot)
1070{
1071 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1072 int space = GET_IOSPACE(pfn);
1073 unsigned long phys_base;
1074
1075 phys_base = offset | (((unsigned long) space) << 32UL);
1076
1077 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1078}
1079#define io_remap_pfn_range io_remap_pfn_range
1080
1081static inline unsigned long __untagged_addr(unsigned long start)
1082{
1083 if (adi_capable()) {
1084 long addr = start;
1085
1086 /* If userspace has passed a versioned address, kernel
1087 * will not find it in the VMAs since it does not store
1088 * the version tags in the list of VMAs. Storing version
1089 * tags in list of VMAs is impractical since they can be
1090 * changed any time from userspace without dropping into
1091 * kernel. Any address search in VMAs will be done with
1092 * non-versioned addresses. Ensure the ADI version bits
1093 * are dropped here by sign extending the last bit before
1094 * ADI bits. IOMMU does not implement version tags.
1095 */
1096 return (addr << (long)adi_nbits()) >> (long)adi_nbits();
1097 }
1098
1099 return start;
1100}
1101#define untagged_addr(addr) \
1102 ((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
1103
1104static inline bool pte_access_permitted(pte_t pte, bool write)
1105{
1106 u64 prot;
1107
1108 if (tlb_type == hypervisor) {
1109 prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
1110 if (write)
1111 prot |= _PAGE_WRITE_4V;
1112 } else {
1113 prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
1114 if (write)
1115 prot |= _PAGE_WRITE_4U;
1116 }
1117
1118 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
1119}
1120#define pte_access_permitted pte_access_permitted
1121
1122#include <asm/tlbflush.h>
1123#include <asm-generic/pgtable.h>
1124
1125/* We provide our own get_unmapped_area to cope with VA holes and
1126 * SHM area cache aliasing for userland.
1127 */
1128#define HAVE_ARCH_UNMAPPED_AREA
1129#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1130
1131/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1132 * the largest alignment possible such that larget PTEs can be used.
1133 */
1134unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1135 unsigned long, unsigned long,
1136 unsigned long);
1137#define HAVE_ARCH_FB_UNMAPPED_AREA
1138
1139void sun4v_register_fault_status(void);
1140void sun4v_ktsb_register(void);
1141void __init cheetah_ecache_flush_init(void);
1142void sun4v_patch_tlb_handlers(void);
1143
1144extern unsigned long cmdline_memory_size;
1145
1146asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1147
1148#endif /* !(__ASSEMBLY__) */
1149
1150#endif /* !(_SPARC64_PGTABLE_H) */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * pgtable.h: SpitFire page table operations.
4 *
5 * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
9#ifndef _SPARC64_PGTABLE_H
10#define _SPARC64_PGTABLE_H
11
12/* This file contains the functions and defines necessary to modify and use
13 * the SpitFire page tables.
14 */
15
16#include <asm-generic/pgtable-nop4d.h>
17#include <linux/compiler.h>
18#include <linux/const.h>
19#include <asm/types.h>
20#include <asm/spitfire.h>
21#include <asm/asi.h>
22#include <asm/adi.h>
23#include <asm/page.h>
24#include <asm/processor.h>
25
26/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
27 * The page copy blockops can use 0x6000000 to 0x8000000.
28 * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
29 * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
30 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
31 * The vmalloc area spans 0x100000000 to 0x200000000.
32 * Since modules need to be in the lowest 32-bits of the address space,
33 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
34 * There is a single static kernel PMD which maps from 0x0 to address
35 * 0x400000000.
36 */
37#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
38#define TSBMAP_8K_BASE _AC(0x0000000008000000,UL)
39#define TSBMAP_4M_BASE _AC(0x0000000008400000,UL)
40#define MODULES_VADDR _AC(0x0000000010000000,UL)
41#define MODULES_LEN _AC(0x00000000e0000000,UL)
42#define MODULES_END _AC(0x00000000f0000000,UL)
43#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
44#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
45#define VMALLOC_START _AC(0x0000000100000000,UL)
46#define VMEMMAP_BASE VMALLOC_END
47
48/* PMD_SHIFT determines the size of the area a second-level page
49 * table can map
50 */
51#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
52#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
53#define PMD_MASK (~(PMD_SIZE-1))
54#define PMD_BITS (PAGE_SHIFT - 3)
55
56/* PUD_SHIFT determines the size of the area a third-level page
57 * table can map
58 */
59#define PUD_SHIFT (PMD_SHIFT + PMD_BITS)
60#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
61#define PUD_MASK (~(PUD_SIZE-1))
62#define PUD_BITS (PAGE_SHIFT - 3)
63
64/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
65#define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS)
66#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
67#define PGDIR_MASK (~(PGDIR_SIZE-1))
68#define PGDIR_BITS (PAGE_SHIFT - 3)
69
70#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
71#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
72#endif
73
74#if (PGDIR_SHIFT + PGDIR_BITS) != 53
75#error Page table parameters do not cover virtual address space properly.
76#endif
77
78#if (PMD_SHIFT != HPAGE_SHIFT)
79#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
80#endif
81
82#ifndef __ASSEMBLY__
83
84extern unsigned long VMALLOC_END;
85
86#define vmemmap ((struct page *)VMEMMAP_BASE)
87
88#include <linux/sched.h>
89
90bool kern_addr_valid(unsigned long addr);
91
92/* Entries per page directory level. */
93#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
94#define PTRS_PER_PMD (1UL << PMD_BITS)
95#define PTRS_PER_PUD (1UL << PUD_BITS)
96#define PTRS_PER_PGD (1UL << PGDIR_BITS)
97
98#define pmd_ERROR(e) \
99 pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \
100 __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0))
101#define pud_ERROR(e) \
102 pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \
103 __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0))
104#define pgd_ERROR(e) \
105 pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \
106 __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0))
107
108#endif /* !(__ASSEMBLY__) */
109
110/* PTE bits which are the same in SUN4U and SUN4V format. */
111#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
112#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
113#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
114#define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */
115#define _PAGE_PUD_HUGE _PAGE_PMD_HUGE
116
117/* SUN4U pte bits... */
118#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
119#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
120#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
121#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
122#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
123#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
124#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
125#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
126#define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */
127#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
128#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
129#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
130#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
131#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
132#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
133#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
134#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
135#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
136#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
137#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
138#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
139#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
140#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
141#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
142#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
143#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
144#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
145#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
146#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
147
148/* SUN4V pte bits... */
149#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
150#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
151#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
152#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
153#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
154#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
155#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
156#define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */
157#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
158#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
159#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
160#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
161#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
162/* Bit 9 is used to enable MCD corruption detection instead on M7 */
163#define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */
164#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
165#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
166#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
167#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
168#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
169#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
170#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
171#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
172#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
173#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
174#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
175#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
176#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
177#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
178#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
179
180#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
181#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
182
183#if REAL_HPAGE_SHIFT != 22
184#error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
185#endif
186
187#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
188#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
189
190/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
191#define __P000 __pgprot(0)
192#define __P001 __pgprot(0)
193#define __P010 __pgprot(0)
194#define __P011 __pgprot(0)
195#define __P100 __pgprot(0)
196#define __P101 __pgprot(0)
197#define __P110 __pgprot(0)
198#define __P111 __pgprot(0)
199
200#define __S000 __pgprot(0)
201#define __S001 __pgprot(0)
202#define __S010 __pgprot(0)
203#define __S011 __pgprot(0)
204#define __S100 __pgprot(0)
205#define __S101 __pgprot(0)
206#define __S110 __pgprot(0)
207#define __S111 __pgprot(0)
208
209#ifndef __ASSEMBLY__
210
211pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
212
213unsigned long pte_sz_bits(unsigned long size);
214
215extern pgprot_t PAGE_KERNEL;
216extern pgprot_t PAGE_KERNEL_LOCKED;
217extern pgprot_t PAGE_COPY;
218extern pgprot_t PAGE_SHARED;
219
220/* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
221extern unsigned long _PAGE_IE;
222extern unsigned long _PAGE_E;
223extern unsigned long _PAGE_CACHE;
224
225extern unsigned long pg_iobits;
226extern unsigned long _PAGE_ALL_SZ_BITS;
227
228extern struct page *mem_map_zero;
229#define ZERO_PAGE(vaddr) (mem_map_zero)
230
231/* PFNs are real physical page numbers. However, mem_map only begins to record
232 * per-page information starting at pfn_base. This is to handle systems where
233 * the first physical page in the machine is at some huge physical address,
234 * such as 4GB. This is common on a partitioned E10000, for example.
235 */
236static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
237{
238 unsigned long paddr = pfn << PAGE_SHIFT;
239
240 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
241 return __pte(paddr | pgprot_val(prot));
242}
243#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
244
245#ifdef CONFIG_TRANSPARENT_HUGEPAGE
246static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
247{
248 pte_t pte = pfn_pte(page_nr, pgprot);
249
250 return __pmd(pte_val(pte));
251}
252#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
253#endif
254
255/* This one can be done with two shifts. */
256static inline unsigned long pte_pfn(pte_t pte)
257{
258 unsigned long ret;
259
260 __asm__ __volatile__(
261 "\n661: sllx %1, %2, %0\n"
262 " srlx %0, %3, %0\n"
263 " .section .sun4v_2insn_patch, \"ax\"\n"
264 " .word 661b\n"
265 " sllx %1, %4, %0\n"
266 " srlx %0, %5, %0\n"
267 " .previous\n"
268 : "=r" (ret)
269 : "r" (pte_val(pte)),
270 "i" (21), "i" (21 + PAGE_SHIFT),
271 "i" (8), "i" (8 + PAGE_SHIFT));
272
273 return ret;
274}
275#define pte_page(x) pfn_to_page(pte_pfn(x))
276
277static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
278{
279 unsigned long mask, tmp;
280
281 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
282 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
283 *
284 * Even if we use negation tricks the result is still a 6
285 * instruction sequence, so don't try to play fancy and just
286 * do the most straightforward implementation.
287 *
288 * Note: We encode this into 3 sun4v 2-insn patch sequences.
289 */
290
291 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
292 __asm__ __volatile__(
293 "\n661: sethi %%uhi(%2), %1\n"
294 " sethi %%hi(%2), %0\n"
295 "\n662: or %1, %%ulo(%2), %1\n"
296 " or %0, %%lo(%2), %0\n"
297 "\n663: sllx %1, 32, %1\n"
298 " or %0, %1, %0\n"
299 " .section .sun4v_2insn_patch, \"ax\"\n"
300 " .word 661b\n"
301 " sethi %%uhi(%3), %1\n"
302 " sethi %%hi(%3), %0\n"
303 " .word 662b\n"
304 " or %1, %%ulo(%3), %1\n"
305 " or %0, %%lo(%3), %0\n"
306 " .word 663b\n"
307 " sllx %1, 32, %1\n"
308 " or %0, %1, %0\n"
309 " .previous\n"
310 " .section .sun_m7_2insn_patch, \"ax\"\n"
311 " .word 661b\n"
312 " sethi %%uhi(%4), %1\n"
313 " sethi %%hi(%4), %0\n"
314 " .word 662b\n"
315 " or %1, %%ulo(%4), %1\n"
316 " or %0, %%lo(%4), %0\n"
317 " .word 663b\n"
318 " sllx %1, 32, %1\n"
319 " or %0, %1, %0\n"
320 " .previous\n"
321 : "=r" (mask), "=r" (tmp)
322 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
323 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
324 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
325 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
326 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
327 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
328 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
329 _PAGE_CP_4V | _PAGE_E_4V |
330 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
331
332 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
333}
334
335#ifdef CONFIG_TRANSPARENT_HUGEPAGE
336static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
337{
338 pte_t pte = __pte(pmd_val(pmd));
339
340 pte = pte_modify(pte, newprot);
341
342 return __pmd(pte_val(pte));
343}
344#endif
345
346static inline pgprot_t pgprot_noncached(pgprot_t prot)
347{
348 unsigned long val = pgprot_val(prot);
349
350 __asm__ __volatile__(
351 "\n661: andn %0, %2, %0\n"
352 " or %0, %3, %0\n"
353 " .section .sun4v_2insn_patch, \"ax\"\n"
354 " .word 661b\n"
355 " andn %0, %4, %0\n"
356 " or %0, %5, %0\n"
357 " .previous\n"
358 " .section .sun_m7_2insn_patch, \"ax\"\n"
359 " .word 661b\n"
360 " andn %0, %6, %0\n"
361 " or %0, %5, %0\n"
362 " .previous\n"
363 : "=r" (val)
364 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
365 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
366 "i" (_PAGE_CP_4V));
367
368 return __pgprot(val);
369}
370/* Various pieces of code check for platform support by ifdef testing
371 * on "pgprot_noncached". That's broken and should be fixed, but for
372 * now...
373 */
374#define pgprot_noncached pgprot_noncached
375
376#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
377pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
378#define arch_make_huge_pte arch_make_huge_pte
379static inline unsigned long __pte_default_huge_mask(void)
380{
381 unsigned long mask;
382
383 __asm__ __volatile__(
384 "\n661: sethi %%uhi(%1), %0\n"
385 " sllx %0, 32, %0\n"
386 " .section .sun4v_2insn_patch, \"ax\"\n"
387 " .word 661b\n"
388 " mov %2, %0\n"
389 " nop\n"
390 " .previous\n"
391 : "=r" (mask)
392 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
393
394 return mask;
395}
396
397static inline pte_t pte_mkhuge(pte_t pte)
398{
399 return __pte(pte_val(pte) | __pte_default_huge_mask());
400}
401
402static inline bool is_default_hugetlb_pte(pte_t pte)
403{
404 unsigned long mask = __pte_default_huge_mask();
405
406 return (pte_val(pte) & mask) == mask;
407}
408
409static inline bool is_hugetlb_pmd(pmd_t pmd)
410{
411 return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
412}
413
414static inline bool is_hugetlb_pud(pud_t pud)
415{
416 return !!(pud_val(pud) & _PAGE_PUD_HUGE);
417}
418
419#ifdef CONFIG_TRANSPARENT_HUGEPAGE
420static inline pmd_t pmd_mkhuge(pmd_t pmd)
421{
422 pte_t pte = __pte(pmd_val(pmd));
423
424 pte = pte_mkhuge(pte);
425 pte_val(pte) |= _PAGE_PMD_HUGE;
426
427 return __pmd(pte_val(pte));
428}
429#endif
430#else
431static inline bool is_hugetlb_pte(pte_t pte)
432{
433 return false;
434}
435#endif
436
437static inline pte_t pte_mkdirty(pte_t pte)
438{
439 unsigned long val = pte_val(pte), tmp;
440
441 __asm__ __volatile__(
442 "\n661: or %0, %3, %0\n"
443 " nop\n"
444 "\n662: nop\n"
445 " nop\n"
446 " .section .sun4v_2insn_patch, \"ax\"\n"
447 " .word 661b\n"
448 " sethi %%uhi(%4), %1\n"
449 " sllx %1, 32, %1\n"
450 " .word 662b\n"
451 " or %1, %%lo(%4), %1\n"
452 " or %0, %1, %0\n"
453 " .previous\n"
454 : "=r" (val), "=r" (tmp)
455 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
456 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
457
458 return __pte(val);
459}
460
461static inline pte_t pte_mkclean(pte_t pte)
462{
463 unsigned long val = pte_val(pte), tmp;
464
465 __asm__ __volatile__(
466 "\n661: andn %0, %3, %0\n"
467 " nop\n"
468 "\n662: nop\n"
469 " nop\n"
470 " .section .sun4v_2insn_patch, \"ax\"\n"
471 " .word 661b\n"
472 " sethi %%uhi(%4), %1\n"
473 " sllx %1, 32, %1\n"
474 " .word 662b\n"
475 " or %1, %%lo(%4), %1\n"
476 " andn %0, %1, %0\n"
477 " .previous\n"
478 : "=r" (val), "=r" (tmp)
479 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
480 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
481
482 return __pte(val);
483}
484
485static inline pte_t pte_mkwrite(pte_t pte)
486{
487 unsigned long val = pte_val(pte), mask;
488
489 __asm__ __volatile__(
490 "\n661: mov %1, %0\n"
491 " nop\n"
492 " .section .sun4v_2insn_patch, \"ax\"\n"
493 " .word 661b\n"
494 " sethi %%uhi(%2), %0\n"
495 " sllx %0, 32, %0\n"
496 " .previous\n"
497 : "=r" (mask)
498 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
499
500 return __pte(val | mask);
501}
502
503static inline pte_t pte_wrprotect(pte_t pte)
504{
505 unsigned long val = pte_val(pte), tmp;
506
507 __asm__ __volatile__(
508 "\n661: andn %0, %3, %0\n"
509 " nop\n"
510 "\n662: nop\n"
511 " nop\n"
512 " .section .sun4v_2insn_patch, \"ax\"\n"
513 " .word 661b\n"
514 " sethi %%uhi(%4), %1\n"
515 " sllx %1, 32, %1\n"
516 " .word 662b\n"
517 " or %1, %%lo(%4), %1\n"
518 " andn %0, %1, %0\n"
519 " .previous\n"
520 : "=r" (val), "=r" (tmp)
521 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
522 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
523
524 return __pte(val);
525}
526
527static inline pte_t pte_mkold(pte_t pte)
528{
529 unsigned long mask;
530
531 __asm__ __volatile__(
532 "\n661: mov %1, %0\n"
533 " nop\n"
534 " .section .sun4v_2insn_patch, \"ax\"\n"
535 " .word 661b\n"
536 " sethi %%uhi(%2), %0\n"
537 " sllx %0, 32, %0\n"
538 " .previous\n"
539 : "=r" (mask)
540 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
541
542 mask |= _PAGE_R;
543
544 return __pte(pte_val(pte) & ~mask);
545}
546
547static inline pte_t pte_mkyoung(pte_t pte)
548{
549 unsigned long mask;
550
551 __asm__ __volatile__(
552 "\n661: mov %1, %0\n"
553 " nop\n"
554 " .section .sun4v_2insn_patch, \"ax\"\n"
555 " .word 661b\n"
556 " sethi %%uhi(%2), %0\n"
557 " sllx %0, 32, %0\n"
558 " .previous\n"
559 : "=r" (mask)
560 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
561
562 mask |= _PAGE_R;
563
564 return __pte(pte_val(pte) | mask);
565}
566
567static inline pte_t pte_mkspecial(pte_t pte)
568{
569 pte_val(pte) |= _PAGE_SPECIAL;
570 return pte;
571}
572
573static inline pte_t pte_mkmcd(pte_t pte)
574{
575 pte_val(pte) |= _PAGE_MCD_4V;
576 return pte;
577}
578
579static inline pte_t pte_mknotmcd(pte_t pte)
580{
581 pte_val(pte) &= ~_PAGE_MCD_4V;
582 return pte;
583}
584
585static inline unsigned long pte_young(pte_t pte)
586{
587 unsigned long mask;
588
589 __asm__ __volatile__(
590 "\n661: mov %1, %0\n"
591 " nop\n"
592 " .section .sun4v_2insn_patch, \"ax\"\n"
593 " .word 661b\n"
594 " sethi %%uhi(%2), %0\n"
595 " sllx %0, 32, %0\n"
596 " .previous\n"
597 : "=r" (mask)
598 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
599
600 return (pte_val(pte) & mask);
601}
602
603static inline unsigned long pte_dirty(pte_t pte)
604{
605 unsigned long mask;
606
607 __asm__ __volatile__(
608 "\n661: mov %1, %0\n"
609 " nop\n"
610 " .section .sun4v_2insn_patch, \"ax\"\n"
611 " .word 661b\n"
612 " sethi %%uhi(%2), %0\n"
613 " sllx %0, 32, %0\n"
614 " .previous\n"
615 : "=r" (mask)
616 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
617
618 return (pte_val(pte) & mask);
619}
620
621static inline unsigned long pte_write(pte_t pte)
622{
623 unsigned long mask;
624
625 __asm__ __volatile__(
626 "\n661: mov %1, %0\n"
627 " nop\n"
628 " .section .sun4v_2insn_patch, \"ax\"\n"
629 " .word 661b\n"
630 " sethi %%uhi(%2), %0\n"
631 " sllx %0, 32, %0\n"
632 " .previous\n"
633 : "=r" (mask)
634 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
635
636 return (pte_val(pte) & mask);
637}
638
639static inline unsigned long pte_exec(pte_t pte)
640{
641 unsigned long mask;
642
643 __asm__ __volatile__(
644 "\n661: sethi %%hi(%1), %0\n"
645 " .section .sun4v_1insn_patch, \"ax\"\n"
646 " .word 661b\n"
647 " mov %2, %0\n"
648 " .previous\n"
649 : "=r" (mask)
650 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
651
652 return (pte_val(pte) & mask);
653}
654
655static inline unsigned long pte_present(pte_t pte)
656{
657 unsigned long val = pte_val(pte);
658
659 __asm__ __volatile__(
660 "\n661: and %0, %2, %0\n"
661 " .section .sun4v_1insn_patch, \"ax\"\n"
662 " .word 661b\n"
663 " and %0, %3, %0\n"
664 " .previous\n"
665 : "=r" (val)
666 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
667
668 return val;
669}
670
671#define pte_accessible pte_accessible
672static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
673{
674 return pte_val(a) & _PAGE_VALID;
675}
676
677static inline unsigned long pte_special(pte_t pte)
678{
679 return pte_val(pte) & _PAGE_SPECIAL;
680}
681
682#define pmd_leaf pmd_large
683static inline unsigned long pmd_large(pmd_t pmd)
684{
685 pte_t pte = __pte(pmd_val(pmd));
686
687 return pte_val(pte) & _PAGE_PMD_HUGE;
688}
689
690static inline unsigned long pmd_pfn(pmd_t pmd)
691{
692 pte_t pte = __pte(pmd_val(pmd));
693
694 return pte_pfn(pte);
695}
696
697#define pmd_write pmd_write
698static inline unsigned long pmd_write(pmd_t pmd)
699{
700 pte_t pte = __pte(pmd_val(pmd));
701
702 return pte_write(pte);
703}
704
705#define pud_write(pud) pte_write(__pte(pud_val(pud)))
706
707#ifdef CONFIG_TRANSPARENT_HUGEPAGE
708static inline unsigned long pmd_dirty(pmd_t pmd)
709{
710 pte_t pte = __pte(pmd_val(pmd));
711
712 return pte_dirty(pte);
713}
714
715static inline unsigned long pmd_young(pmd_t pmd)
716{
717 pte_t pte = __pte(pmd_val(pmd));
718
719 return pte_young(pte);
720}
721
722static inline unsigned long pmd_trans_huge(pmd_t pmd)
723{
724 pte_t pte = __pte(pmd_val(pmd));
725
726 return pte_val(pte) & _PAGE_PMD_HUGE;
727}
728
729static inline pmd_t pmd_mkold(pmd_t pmd)
730{
731 pte_t pte = __pte(pmd_val(pmd));
732
733 pte = pte_mkold(pte);
734
735 return __pmd(pte_val(pte));
736}
737
738static inline pmd_t pmd_wrprotect(pmd_t pmd)
739{
740 pte_t pte = __pte(pmd_val(pmd));
741
742 pte = pte_wrprotect(pte);
743
744 return __pmd(pte_val(pte));
745}
746
747static inline pmd_t pmd_mkdirty(pmd_t pmd)
748{
749 pte_t pte = __pte(pmd_val(pmd));
750
751 pte = pte_mkdirty(pte);
752
753 return __pmd(pte_val(pte));
754}
755
756static inline pmd_t pmd_mkclean(pmd_t pmd)
757{
758 pte_t pte = __pte(pmd_val(pmd));
759
760 pte = pte_mkclean(pte);
761
762 return __pmd(pte_val(pte));
763}
764
765static inline pmd_t pmd_mkyoung(pmd_t pmd)
766{
767 pte_t pte = __pte(pmd_val(pmd));
768
769 pte = pte_mkyoung(pte);
770
771 return __pmd(pte_val(pte));
772}
773
774static inline pmd_t pmd_mkwrite(pmd_t pmd)
775{
776 pte_t pte = __pte(pmd_val(pmd));
777
778 pte = pte_mkwrite(pte);
779
780 return __pmd(pte_val(pte));
781}
782
783static inline pgprot_t pmd_pgprot(pmd_t entry)
784{
785 unsigned long val = pmd_val(entry);
786
787 return __pgprot(val);
788}
789#endif
790
791static inline int pmd_present(pmd_t pmd)
792{
793 return pmd_val(pmd) != 0UL;
794}
795
796#define pmd_none(pmd) (!pmd_val(pmd))
797
798/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
799 * very simple, it's just the physical address. PTE tables are of
800 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
801 * the top bits outside of the range of any physical address size we
802 * support are clear as well. We also validate the physical itself.
803 */
804#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
805
806#define pud_none(pud) (!pud_val(pud))
807
808#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
809
810#define p4d_none(p4d) (!p4d_val(p4d))
811
812#define p4d_bad(p4d) (p4d_val(p4d) & ~PAGE_MASK)
813
814#ifdef CONFIG_TRANSPARENT_HUGEPAGE
815void set_pmd_at(struct mm_struct *mm, unsigned long addr,
816 pmd_t *pmdp, pmd_t pmd);
817#else
818static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
819 pmd_t *pmdp, pmd_t pmd)
820{
821 *pmdp = pmd;
822}
823#endif
824
825static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
826{
827 unsigned long val = __pa((unsigned long) (ptep));
828
829 pmd_val(*pmdp) = val;
830}
831
832#define pud_set(pudp, pmdp) \
833 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
834static inline unsigned long pmd_page_vaddr(pmd_t pmd)
835{
836 pte_t pte = __pte(pmd_val(pmd));
837 unsigned long pfn;
838
839 pfn = pte_pfn(pte);
840
841 return ((unsigned long) __va(pfn << PAGE_SHIFT));
842}
843
844static inline pmd_t *pud_pgtable(pud_t pud)
845{
846 pte_t pte = __pte(pud_val(pud));
847 unsigned long pfn;
848
849 pfn = pte_pfn(pte);
850
851 return ((pmd_t *) __va(pfn << PAGE_SHIFT));
852}
853
854#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
855#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
856#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
857#define pud_present(pud) (pud_val(pud) != 0U)
858#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
859#define p4d_pgtable(p4d) \
860 ((pud_t *) __va(p4d_val(p4d)))
861#define p4d_present(p4d) (p4d_val(p4d) != 0U)
862#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL)
863
864/* only used by the stubbed out hugetlb gup code, should never be called */
865#define p4d_page(p4d) NULL
866
867#define pud_leaf pud_large
868static inline unsigned long pud_large(pud_t pud)
869{
870 pte_t pte = __pte(pud_val(pud));
871
872 return pte_val(pte) & _PAGE_PMD_HUGE;
873}
874
875static inline unsigned long pud_pfn(pud_t pud)
876{
877 pte_t pte = __pte(pud_val(pud));
878
879 return pte_pfn(pte);
880}
881
882/* Same in both SUN4V and SUN4U. */
883#define pte_none(pte) (!pte_val(pte))
884
885#define p4d_set(p4dp, pudp) \
886 (p4d_val(*(p4dp)) = (__pa((unsigned long) (pudp))))
887
888/* We cannot include <linux/mm_types.h> at this point yet: */
889extern struct mm_struct init_mm;
890
891/* Actual page table PTE updates. */
892void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
893 pte_t *ptep, pte_t orig, int fullmm,
894 unsigned int hugepage_shift);
895
896static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
897 pte_t *ptep, pte_t orig, int fullmm,
898 unsigned int hugepage_shift)
899{
900 /* It is more efficient to let flush_tlb_kernel_range()
901 * handle init_mm tlb flushes.
902 *
903 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
904 * and SUN4V pte layout, so this inline test is fine.
905 */
906 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
907 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
908}
909
910#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
911static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
912 unsigned long addr,
913 pmd_t *pmdp)
914{
915 pmd_t pmd = *pmdp;
916 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
917 return pmd;
918}
919
920static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
921 pte_t *ptep, pte_t pte, int fullmm)
922{
923 pte_t orig = *ptep;
924
925 *ptep = pte;
926 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
927}
928
929#define set_pte_at(mm,addr,ptep,pte) \
930 __set_pte_at((mm), (addr), (ptep), (pte), 0)
931
932#define pte_clear(mm,addr,ptep) \
933 set_pte_at((mm), (addr), (ptep), __pte(0UL))
934
935#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
936#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
937 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
938
939#ifdef DCACHE_ALIASING_POSSIBLE
940#define __HAVE_ARCH_MOVE_PTE
941#define move_pte(pte, prot, old_addr, new_addr) \
942({ \
943 pte_t newpte = (pte); \
944 if (tlb_type != hypervisor && pte_present(pte)) { \
945 unsigned long this_pfn = pte_pfn(pte); \
946 \
947 if (pfn_valid(this_pfn) && \
948 (((old_addr) ^ (new_addr)) & (1 << 13))) \
949 flush_dcache_page_all(current->mm, \
950 pfn_to_page(this_pfn)); \
951 } \
952 newpte; \
953})
954#endif
955
956extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
957
958void paging_init(void);
959unsigned long find_ecache_flush_span(unsigned long size);
960
961struct seq_file;
962void mmu_info(struct seq_file *);
963
964struct vm_area_struct;
965void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
966#ifdef CONFIG_TRANSPARENT_HUGEPAGE
967void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
968 pmd_t *pmd);
969
970#define __HAVE_ARCH_PMDP_INVALIDATE
971extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
972 pmd_t *pmdp);
973
974#define __HAVE_ARCH_PGTABLE_DEPOSIT
975void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
976 pgtable_t pgtable);
977
978#define __HAVE_ARCH_PGTABLE_WITHDRAW
979pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
980#endif
981
982/* Encode and de-code a swap entry */
983#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
984#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
985#define __swp_entry(type, offset) \
986 ( (swp_entry_t) \
987 { \
988 (((long)(type) << PAGE_SHIFT) | \
989 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
990 } )
991#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
992#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
993
994int page_in_phys_avail(unsigned long paddr);
995
996/*
997 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
998 * its high 4 bits. These macros/functions put it there or get it from there.
999 */
1000#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
1001#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
1002#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
1003
1004int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
1005 unsigned long, pgprot_t);
1006
1007void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1008 unsigned long addr, pte_t pte);
1009
1010int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1011 unsigned long addr, pte_t oldpte);
1012
1013#define __HAVE_ARCH_DO_SWAP_PAGE
1014static inline void arch_do_swap_page(struct mm_struct *mm,
1015 struct vm_area_struct *vma,
1016 unsigned long addr,
1017 pte_t pte, pte_t oldpte)
1018{
1019 /* If this is a new page being mapped in, there can be no
1020 * ADI tags stored away for this page. Skip looking for
1021 * stored tags
1022 */
1023 if (pte_none(oldpte))
1024 return;
1025
1026 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
1027 adi_restore_tags(mm, vma, addr, pte);
1028}
1029
1030#define __HAVE_ARCH_UNMAP_ONE
1031static inline int arch_unmap_one(struct mm_struct *mm,
1032 struct vm_area_struct *vma,
1033 unsigned long addr, pte_t oldpte)
1034{
1035 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
1036 return adi_save_tags(mm, vma, addr, oldpte);
1037 return 0;
1038}
1039
1040static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1041 unsigned long from, unsigned long pfn,
1042 unsigned long size, pgprot_t prot)
1043{
1044 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1045 int space = GET_IOSPACE(pfn);
1046 unsigned long phys_base;
1047
1048 phys_base = offset | (((unsigned long) space) << 32UL);
1049
1050 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1051}
1052#define io_remap_pfn_range io_remap_pfn_range
1053
1054static inline unsigned long __untagged_addr(unsigned long start)
1055{
1056 if (adi_capable()) {
1057 long addr = start;
1058
1059 /* If userspace has passed a versioned address, kernel
1060 * will not find it in the VMAs since it does not store
1061 * the version tags in the list of VMAs. Storing version
1062 * tags in list of VMAs is impractical since they can be
1063 * changed any time from userspace without dropping into
1064 * kernel. Any address search in VMAs will be done with
1065 * non-versioned addresses. Ensure the ADI version bits
1066 * are dropped here by sign extending the last bit before
1067 * ADI bits. IOMMU does not implement version tags.
1068 */
1069 return (addr << (long)adi_nbits()) >> (long)adi_nbits();
1070 }
1071
1072 return start;
1073}
1074#define untagged_addr(addr) \
1075 ((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
1076
1077static inline bool pte_access_permitted(pte_t pte, bool write)
1078{
1079 u64 prot;
1080
1081 if (tlb_type == hypervisor) {
1082 prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
1083 if (write)
1084 prot |= _PAGE_WRITE_4V;
1085 } else {
1086 prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
1087 if (write)
1088 prot |= _PAGE_WRITE_4U;
1089 }
1090
1091 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
1092}
1093#define pte_access_permitted pte_access_permitted
1094
1095#include <asm/tlbflush.h>
1096
1097/* We provide our own get_unmapped_area to cope with VA holes and
1098 * SHM area cache aliasing for userland.
1099 */
1100#define HAVE_ARCH_UNMAPPED_AREA
1101#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1102
1103/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1104 * the largest alignment possible such that larget PTEs can be used.
1105 */
1106unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1107 unsigned long, unsigned long,
1108 unsigned long);
1109#define HAVE_ARCH_FB_UNMAPPED_AREA
1110
1111void sun4v_register_fault_status(void);
1112void sun4v_ktsb_register(void);
1113void __init cheetah_ecache_flush_init(void);
1114void sun4v_patch_tlb_handlers(void);
1115
1116extern unsigned long cmdline_memory_size;
1117
1118asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1119
1120#define pmd_pgtable(PMD) ((pte_t *)pmd_page_vaddr(PMD))
1121
1122#ifdef CONFIG_HUGETLB_PAGE
1123
1124#define pud_leaf_size pud_leaf_size
1125extern unsigned long pud_leaf_size(pud_t pud);
1126
1127#define pmd_leaf_size pmd_leaf_size
1128extern unsigned long pmd_leaf_size(pmd_t pmd);
1129
1130#define pte_leaf_size pte_leaf_size
1131extern unsigned long pte_leaf_size(pte_t pte);
1132
1133#endif /* CONFIG_HUGETLB_PAGE */
1134
1135#endif /* !(__ASSEMBLY__) */
1136
1137#endif /* !(_SPARC64_PGTABLE_H) */